Peoria (IL)
September
Weather in Peoria, Illinois for September 2025
Your guide to Peoria weather in September - trends and predictions
In general, the average temperature in Peoria at the beginning of September is 25.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.1 °F by the end of September.
With an average of 3 rainy days, Peoria experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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27
Dry days
3
Rainy days
0
Snow days
27°/14°
Temperatures
19 km/h
Avg max wind
60 %
Avg humidity
Peoria Weather September
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Temperatures trend during September in Peoria
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September weather in Peoria day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 2 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 3 |  Partly cloudy | 26° /11° | 0 mm | 7 | |
| Sept. 4 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 5 |  Mist | 32° /17° | 0 mm | 7 | |
| Sept. 6 | Partly cloudy | 23° /13° | 0.1 mm | 6 | |
| Sept. 7 | Sunny | 20° /6° | 0 mm | 6 | |
| Sept. 8 | Sunny | 24° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 29° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 11 | Sunny | 33° /15° | 0 mm | 8 | |
| Sept. 12 | Sunny | 33° /17° | 0 mm | 8 | |
| Sept. 13 |  Overcast | 25° /17° | 0 mm | 6 | |
| Sept. 14 |  Patchy rain possible | 31° /17° | 0.1 mm | 7 | |
| Sept. 15 |  Cloudy | 32° /19° | 0 mm | 7 | |
| Sept. 16 | Sunny | 33° /18° | 0 mm | 8 | |
| Sept. 17 | Sunny | 29° /14° | 0 mm | 7 | |
| Sept. 18 | Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 19 | Partly cloudy | 30° /15° | 0 mm | 8 | |
| Sept. 20 |  Heavy rain at times | 31° /18° | 5.5 mm | 7 | |
| Sept. 21 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 22 |  Moderate rain | 20° /17° | 31 mm | 5 | |
| Sept. 23 | Fog | 24° /11° | 0 mm | 5 | |
| Sept. 24 |  Moderate or heavy rain shower | 20° /14° | 13.8 mm | 5 | |
| Sept. 25 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 26 | Cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 27 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 28 | Overcast | 21° /18° | 0 mm | 5 | |
| Sept. 29 | Cloudy | 25° /17° | 0 mm | 6 | |
| Sept. 30 | Fog | 25° /16° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Peoria in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Peoria forecast closer to your planned date for the most up-to-date weather information.
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Peoria in September - FAQ
What are the expected maximum and minimum temperatures in Peoria during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Peoria during September?
Moderate rainfall is anticipated in Peoria during September, with a total of 50.4 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Peoria during September?
The average wind speed in Peoria during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Peoria
Explore the daily rainfall trends and prepare for Peorias September weather 💧
UV exposure in Peoria during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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